Seawater butterfly valve with movable valve seat

Abstract

The utility model discloses a seawater butterfly valve with a movable valve seat, which comprises a valve body, a valve seat, a butterfly plate and an actuating mechanism, the valve seat is assembled on the inner wall of the valve body, the butterfly plate is arranged in the valve seat, the actuating mechanism is vertically fixed on the top surface of the valve body, a valve rod on the actuating mechanism penetrates through the valve seat and is inserted into the butterfly plate, and the valve seat is fixed on the valve body. The valve seat comprises a first valve seat ring and a second valve seat ring, the first valve seat ring and the second valve seat ring are assembled on the two sides of the inner wall of the valve body correspondingly, moving grooves are horizontally formed in the inner circumferential face of the first valve seat ring and the inner circumferential face of the second valve seat ring correspondingly, moving sealing rings are vertically arranged in the moving grooves, and the moving sealing rings are horizontally assembled in the moving grooves in a sliding mode. The butterfly valve solves the problems that a valve seat of a butterfly valve structure is of a fixed structure, a valve plate and the valve seat are sealed in an extrusion mode, the elasticity of the valve seat becomes poor in long-time use, a gap exists between the valve seat and the valve plate, and therefore the sealing effect between the valve plate and the valve seat is affected.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valve technology, and more specifically, to a seawater butterfly valve with a movable valve seat. Background Technology

[0002] A butterfly valve is a commonly used regulating and shut-off valve. It is characterized by its simple structure, small size, light weight, and convenient operation. It is suitable for fluid control in large diameter and low pressure applications. A butterfly valve consists of a valve body, a butterfly plate, and an actuator.

[0003] The existing announcement number is CN202790597U, named "A Butterfly Valve Seat". The valve seat is made of silicone rubber material, replacing the original EPDM material. In addition to having excellent heat resistance, cold resistance, dielectric properties, ozone resistance and atmospheric aging resistance, the most outstanding performance is a wide operating temperature range.

[0004] However, the valve seat of the butterfly valve structure mentioned above is a fixed structure, and the valve plate and valve seat are sealed by compression. Over a long period of use, the elasticity of the valve seat deteriorates, resulting in a gap between the valve seat and the valve plate, which affects the sealing effect between the valve plate and the valve seat. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] In view of the problems existing in the prior art, the purpose of this utility model is to provide a seawater butterfly valve with a movable valve seat, which overcomes the above-mentioned technical defects.

[0007] 2. Technical Solution

[0008] To solve the above problems, the present invention adopts the following technical solution.

[0009] A seawater butterfly valve with a movable valve seat includes a valve body, a valve seat, a disc, and an actuator. The valve seat is assembled on the inner wall of the valve body, and the disc is disposed in the valve seat. The actuator is vertically fixed on the top surface of the valve body, and the valve stem of the actuator passes through the valve seat and is inserted into the disc. The valve seat includes a first valve seat ring and a second valve seat ring, which are respectively assembled on both sides of the inner wall of the valve body. The inner circumferential surfaces of the first valve seat ring and the second valve seat ring are horizontally provided with moving grooves. A moving sealing ring is vertically disposed in the moving groove, and the moving sealing ring is horizontally slidably assembled in the moving groove.

[0010] Furthermore, multiple elastic sleeves are evenly and horizontally arranged on the adjacent end faces of the first valve seat ring and the second valve seat ring, and one end of each elastic sleeve is fixed to the adjacent end face of the first valve seat ring and the second valve seat ring.

[0011] Furthermore, multiple assembly slots are evenly and horizontally opened on the adjacent end faces of the second valve seat ring and the first valve seat ring, and the multiple assembly slots are inserted into and matched with multiple elastic sleeves one by one.

[0012] Furthermore, both the first valve seat ring and the second valve seat ring have assembly grooves on their outer walls, and multiple pressure grooves are evenly and horizontally formed inside the assembly grooves.

[0013] Furthermore, multiple elastic pressure frames are uniformly and horizontally fixed on the inner wall of the valve body, and the multiple elastic pressure frames are inserted into the multiple pressure grooves on the first valve seat ring and the second valve seat ring in a one-to-one correspondence.

[0014] Furthermore, both the upper and lower sides of the first and second valve seat rings are provided with through holes.

[0015] Furthermore, multiple sliding grooves are evenly and horizontally opened on the outer circumference of the movable sealing ring, and multiple sliding strips are evenly and horizontally fixed on the inner wall of the movable groove, and the multiple sliding strips on the movable groove slide and assemble with the multiple sliding grooves on the movable sealing ring.

[0016] 3. Beneficial effects

[0017] Compared with existing technologies, the advantages of this utility model are:

[0018] When the valve seat is installed inside the valve body during use, the first and second valve seat rings on the valve seat are symmetrically assembled on both sides of the disc. The first and second valve seat rings are slidably assembled on the inner wall of the valve body. During use, the fluid flowing in the valve body impacts the valve seat, and the pressure in the fluid pushes the movable sealing ring to slide horizontally in the movable groove of the valve seat, pushing the movable sealing ring to fit tightly against the gap between the disc and the valve seat, thereby ensuring the effectiveness of the seal between the disc and the valve seat. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the valve seat in its disassembled state during the implementation of this utility model;

[0021] Figure 3 This is a schematic diagram of the first valve seat ring in its disassembled state during the implementation of this utility model.

[0022] Figure 4 This is a schematic diagram of the second valve seat ring in its disassembled state during the implementation of this utility model.

[0023] Explanation of the labels in the diagram:

[0024] 1. Valve body; 2. Valve seat; 21. First valve seat ring; 211. Elastic sleeve; 22. First valve seat ring; 221. Assembly slot; 23. Assembly groove; 231. Pressure groove; 232. Elastic pressure frame; 24. Rotary hole; 25. Moving groove; 26. Moving sealing ring; 261. Sliding groove; 3. Disc; 4. Actuator. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-4 A seawater butterfly valve with a movable valve seat includes a valve body 1, a valve seat 2, a disc 3, and an actuator 4. The valve seat 2 is assembled on the inner wall of the valve body 1, and the disc 3 is disposed in the valve seat 2. The actuator 4 is vertically fixed on the top surface of the valve body 1, and the valve stem of the actuator 4 passes through the valve seat 2 and is inserted into the disc 3. The valve seat 2 includes a first valve seat ring 21 and a second valve seat ring 22, which are respectively assembled on both sides of the inner wall of the valve body 1. A moving groove 25 is horizontally opened on the inner circumferential surface of the first valve seat ring 21 and the second valve seat ring 22, and a moving seal is vertically disposed in the moving groove 25. The movable sealing ring 26 is horizontally slidably assembled in the movable groove 25. During use, when the valve seat 2 is installed inside the valve body 1, the first valve seat ring 21 and the second valve seat ring 22 on the valve seat 2 are symmetrically assembled on both sides of the disc 3. The first valve seat ring 21 and the second valve seat ring 22 are limited and slidably assembled on the inner wall of the valve body 1. During use, the fluid flowing in the valve body 1 impacts the valve seat 2, and the pressure in the fluid pushes the movable sealing ring 26 to slide horizontally in the movable groove 25 of the valve seat 2, pushing the movable sealing ring 26 to fit tightly against the gap between the disc 3 and the valve seat 2, thereby ensuring the effectiveness of the seal between the disc 3 and the valve seat 2.

[0027] See Figure 3 and Figure 4Multiple elastic sleeves 211 are evenly and horizontally arranged on the adjacent end faces of the first valve seat ring 21 and the second valve seat ring 22. One end of each elastic sleeve 211 is fixed to the adjacent end faces of the first valve seat ring 21 and the second valve seat ring 22. Multiple assembly slots 221 are evenly and horizontally opened on the adjacent end faces of the second valve seat ring 22 and the first valve seat ring 21. The multiple assembly slots 221 are inserted into the multiple elastic sleeves 211 one by one. During use, when the first valve seat ring 21 and the second valve seat ring 22 are assembled, the first valve seat ring 21 and the second valve seat ring 22 are inserted into the multiple assembly slots 221 one by one through the multiple elastic sleeves 211, which completes the sealing stability of the first valve seat ring 21 and the second valve seat ring 22 in the valve body 1. The valve body 1, which is set separately, is easy to disassemble and replace.

[0028] See Figure 3 and Figure 4 Both the first valve seat ring 21 and the second valve seat ring 22 have assembly grooves 23 on their outer walls, and multiple pressure grooves 231 are evenly and horizontally formed inside the assembly grooves 23. Multiple elastic pressure frames 232 are evenly and horizontally fixed on the inner wall of the valve body 1, and the multiple elastic pressure frames 232 are inserted into the multiple pressure grooves 231 on the first valve seat ring 21 and the second valve seat ring 22 in a one-to-one correspondence. In use, the assembly grooves 23 on the first valve seat ring 21 and the second valve seat ring 22 are limited and slidably inserted into the elastic pressure frames 232 on the inner wall of the valve body 1, thus completing the sealed assembly of the first valve seat ring 21 and the second valve seat ring 22 in the valve body 1.

[0029] See Figure 3 and Figure 4 The first valve seat ring 21 and the second valve seat ring 22 both have through holes 24 on their upper and lower sides. The through holes 24 inside the first valve seat ring 21 and the second valve seat ring 22 are used to pass through the valve stem connecting disc 3.

[0030] See Figure 3 and Figure 4 Multiple sliding grooves 261 are evenly and horizontally opened on the outer circumference of the movable sealing ring 26. Multiple sliding strips are evenly and horizontally fixed on the inner wall of the movable groove 25. The multiple sliding strips on the movable groove 25 are slidably assembled with the multiple sliding grooves 261 on the movable sealing ring 26. In use, the sliding grooves 261 on the outer circumference of the movable sealing ring 26 are slidably assembled with the sliding strips on the movable groove 25, and move horizontally in the movable groove 25 inside the valve seat 2, which facilitates the fluid to push the sealing ring 26 to slide and translate in the movable groove 25.

[0031] When the valve seat 2 is installed inside the valve body 1 during use, the first valve seat ring 21 and the second valve seat ring 22 on the valve seat 2 are symmetrically assembled on both sides of the disc 3. The first valve seat ring 21 and the second valve seat ring 22 are slidably assembled on the inner wall of the valve body 1. During use, the fluid flowing in the valve body 1 impacts the valve seat 2, and the pressure in the fluid pushes the movable sealing ring 26 to slide horizontally in the movable groove 25 of the valve seat 2, pushing the movable sealing ring 26 to fit tightly against the gap between the disc 3 and the valve seat 2.

[0032] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A seawater butterfly valve with a movable valve seat, characterized in that, The device includes a valve body (1), a valve seat (2), a disc plate (3), and an actuator (4). The valve seat (2) is assembled on the inner wall of the valve body (1), and the disc plate (3) is disposed in the valve seat (2). The actuator (4) is vertically fixed on the top surface of the valve body (1), and the valve stem on the actuator (4) passes through the valve seat (2) and is inserted into the disc plate (3). The valve seat (2) includes a first valve seat ring (21) and a second valve seat ring (22). The first valve seat ring (21) and the second valve seat ring (22) are respectively assembled on both sides of the inner wall of the valve body (1), and the inner circumferential surfaces of the first valve seat ring (21) and the second valve seat ring (22) are horizontally provided with moving grooves (25). A moving sealing ring (26) is vertically disposed in the moving groove (25), and the moving sealing ring (26) is horizontally slidably assembled in the moving groove (25).

2. A seawater butterfly valve with a movable valve seat according to claim 1, characterized in that: Multiple elastic sleeves (211) are evenly and horizontally arranged on the adjacent end faces of the first valve seat ring (21) and the second valve seat ring (22), and one end of the multiple elastic sleeves (211) is fixed on the adjacent end faces of the first valve seat ring (21) and the second valve seat ring (22).

3. A seawater butterfly valve with a movable valve seat according to claim 2, characterized in that: The second valve seat ring (22) and the first valve seat ring (21) are provided with a plurality of horizontally evenly arranged assembly slots (221), and the plurality of assembly slots (221) are connected to a plurality of elastic sleeves (211) in a one-to-one manner.

4. A seawater butterfly valve with a movable valve seat according to claim 3, characterized in that: Both the first valve seat ring (21) and the second valve seat ring (22) have assembly grooves (23) on their outer walls, and multiple pressure grooves (231) are evenly and horizontally opened inside the assembly grooves (23).

5. A seawater butterfly valve with a movable valve seat according to claim 4, characterized in that: Multiple elastic pressure frames (232) are uniformly and horizontally fixed on the inner wall of the valve body (1), and the multiple elastic pressure frames (232) are inserted into the multiple pressure grooves (231) on the first valve seat ring (21) and the second valve seat ring (22) in a one-to-one correspondence.

6. A seawater butterfly valve with a movable valve seat according to claim 5, characterized in that: Both the first valve seat ring (21) and the second valve seat ring (22) have through holes (24) on their upper and lower sides.

7. A seawater butterfly valve with a movable valve seat according to claim 1, characterized in that: The movable sealing ring (26) has a plurality of sliding grooves (261) evenly and horizontally opened on its outer circumference. The movable groove (25) has a plurality of sliding strips evenly and horizontally fixed on its inner wall. The sliding strips on the movable groove (25) are slidably assembled with the plurality of sliding grooves (261) on the movable sealing ring (26).

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